#1F4699#1F4699

#1F4699 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 41.8% C 0.143 H 262.8°. Best body text is #FFFFFF at 8.77:1 contrast (WCAG AA passes).

Color values

HEX	#1F4699
RGB	rgb(31, 70, 153)
HSL	hsl(221, 66%, 36%)
HSV	hsv(221, 80%, 60%)
CMYK	cmyk(79.7%, 54.2%, 0%, 40%)
CIE-LAB	lab(31.74, 17.85, -49.30)
CIE-LCH	lch(31.74, 52.43, 289.90°)
OKLab	oklab(41.78% -0.0178 -0.1421)
OKLCH	oklch(41.78% 0.143 262.8)
XYZ	xyz(8.5029, 6.9705, 31.0281)
Luminance	0.0697 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4699 #99721F

analogous

#1F8399 #1F4699 #351F99

triadic

#1F4699 #991F46 #46991F

tetradic

#1F4699 #991F83 #99721F #1F9935

square

#1F4699 #991F83 #99721F #1F9935

split-complementary

#1F4699 #99351F #83991F

monochromatic

#0A1733 #152F66 #1F4699 #295DCC #5681DD

Accessibility & contrast

On white

8.77

#1F4699 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#1F4699 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4699

8.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4699	#FFFFFF	#000000	##FFFFFF
##1F4699	1.00	8.77	2.39	8.77
#FFFFFF	8.77	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04519C

Deuteranopia (green-blind)

#004597

Tritanopia (blue-blind)

#005A68

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1f4699;
/* rgb */ color: rgb(31, 70, 153);
/* oklch */ color: oklch(41.8% 0.143 262.8);

Tailwind

colors: {
  custom: {
    50: '#6f78b8',
    500: '#1f4699',
    950: '#000000',
  },
}

SCSS

$custom: #1f4699;
$custom-light: #6f78b8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4699",
  "rgb": {
    "r": 31,
    "g": 70,
    "b": 153
  },
  "hsl": {
    "h": 220.82,
    "s": 66.304,
    "l": 36.078
  },
  "oklch": {
    "l": 0.41777,
    "c": 0.14322,
    "h": 262.8
  },
  "luminance": 0.06972
}

Semantic roles & 50–950 ramp

primary

#1F4699

secondary

#C09E54

accent

#B33FE9

background

#F7F7FB

surface

#EDEDF6

border

#C8C8D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1F4699

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →